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Rapid heat extraction from the casting causes narrowing of liquid-solid zone which sweeps itself across the molten metal.(a) True(b) FalseThe question was asked in quiz.I would like to ask this question from Mechanism of Solidification topic in chapter Cooling and Solidification of Casting-Forming-Welding I

Answer»

Correct choice is (a) True

The explanation: In SOLIDIFICATION of casting material, it is COMMONLY starts from the centre-line of the mould before the solidification is complete even at the mould FACE. In the chilled mould, due to the RAPID HEAT extraction from the casting, a narrow like liquid-solid zone sweeps across the molten metal.



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